Box joint



B. A. LANGE.

BOX JOINT.

APPLICATION HhED AuG.2. 1920.

1,41 5,368. Patented May 9,1922.

- Inventor:

Bert/mid f1. hangs,

PATENT OFFICE.

NI D --,-s i=ie"raow l. eases-ts s'nnouzs, MISSOURI.

not some sp'eoiilcation'. 01' Letters Iatent. Patented May- 9,1922,

Original applicati onflled Kay 2;, mito is manic. 383,74llf-1J1vlded and this application filed August 2,

' I y' 1920. b52213]. No, 400,625. i

To all whom it comer mi;-

- Be it known that I, Bnnrrronalldhamn,

a citizen of the United StateSf-reSidin at the issouri,

city of st. Louis, in the State of have invented". certain- ,newand useful proveme'nts. in Box Joints, of which the fol-- lowing isa s ecification..

This is a i'vision from, and continuation of, an "application filed by me May 24,1920,

Serial 383,740. g o

, The object of this invention is to provide a cheap and speedy means of creasmg the pasteboard, fiber-board, strawboard, or the v like of which boxes are made at certainlines so that the corners of the box may be quickly and efiiciently formed from said creases. To

do this dies are brought to ether by any suitable means, the material eing engaged be 'tweensaid' dies in sucha manner as to form along-what are usuall they occur,

'in a raised the creases. in the said m'ateriall Previous to my invention, it has been the practice to 'form these creases by two or more operations. B the use of my invention it is possible to orm a'n number of such creases at the same time y a continuous operation.

the shape of said dies, to form creases of any desired cross-section. It will be understood that the term' corners-as herein used applies to such construction whether in a vertical or horizontal plane, i. 0., whether called edges or at whatare usuallycalle corners.

In the accompanying drawm s part of this specification, in whic like numbers of reference! denote like parts wherever Figure 1 is an end elevation showing a set of dies with the paste board in position;

Figure 2 is a section taken on the line 2-2 of Figure 1 showing the upper die member position; I

Figure 3 1s a similar section showmg the die member in a lower position; I

Figure 4 is an end elevation of the upper die member;

Figures 5, 6, and 7 are cross-sectional views showing the corner construction of such boxes;

Figure 8 is a fr'agmental perspective view showing a well-known type of box construction possible with-the use of my invention;

Figure 9 is a view of the blank from whic the end of a solid-ended box is constructed;

Figure 10 is a view showing the arrangeforming ment of dies used in the construction of the endof a solid ended box; and

Figure 11 is a sectional View showing how a plurality-of dies may be employed at the same time. v

The bedor lower die' 1 has an upright guiding box 2 formed thereon. Guide-Ways f 4. are formed in said box at an angle, as

shown in Figures 2' and 3. These guideways receive tongues 3'formed upon'the ends of the upper or movable die members. 5.

Upon the bed 1, is a groove or channel 6,

as shown in Figures 1, 2, and 3. The asteboard 7 is placed upon the bed 1, as s own in Figure 2. The upper die 5 is then pressed downwardly by any suitable means and an extension 8 on the die 5 forces a portion of.

the pasteboard 7 into groove 6 on the bed 1.

Owing to the action of the guide-ways 4} upon the tongues 3, the die'5is forced downwardly'on t e same angle that the guideways 4 are formed. This an ular movement of the upper die member 5 e ectually creases the paste-board at three points, viz: at, the

member 5 descends with an appreciable" force. This force tends to disarran e the general structure :of the paste-board ayer's or laminations so that afterthe paste-board bent so as to form a crease for said box. Obviou'sly by; changing. the shape of. the die members an desiredcorner construction (may be'obtamed with this method of areasing. It is'poss'ible to-put any number of has beencreased as described it'may be easily ;creases in apiece of paste-board in one operation.

Figure 11 shows an arrangement of diesfor creasing the paste-board in a 'plurality' ter 10 are stamped. In case more than four creases-are desired the operation continues h in the same manner. When the two central creases 11 and 12 are formed it results in a movement of the paste-board toward the point of the groove 6 and at the points desig- 80 ,nated by the numerals 9 and 10. The d e.

center 16 of the bed 1, as indicated by the 14 were formed at the same time as the creases 11 and 12 it would result in the straining or breaking of the paste-board 7. In the manufacture of paste-board boxes of the solid-end type, a blank 15, such as shown in Figure 9, is used. It is creased along the dotted line 16, and the flaps-17 are bent upwardly and attached by staples 18 (see Figure 8) to the side walls 19 of the pasteboard box. This method of creasing allowsthese four creases 16 to be put into the blank 15 in one operation. To do this the dies are placed as shown in Figure 10 in uprights 20 mounted upon a rectangular bed 21. The die members 5 are placed at right angles, as shown, and are moved down into the paste-board in pairs so as not to strain said paste-board, as mentioned above.

After the paste-board 7 has been creased as shown in Figures 2 and 3, a corner is formed along said crease, as shown in Figu e 5. The excess paste-board on the inner si e of the corner extends as at 22 from one side 23 of the box and forms a right angle brace for the adjacent wall 24 of the paste-board box. In using the excess paste-board int'his way,the paste-board is prevented from bulging at the outer edge of the corner 25. This permits the boxes to be packed closer together when. shipping and gives a stronger box corner.

Obviously, by changingthe mounting of the dies 5, any desired shape ofpaste-board may be creased. With this method of creasing a much greater range is provided. The manufacture of paste-board'boxes is by this invention cheapened and the mechanism necessary to form the creases in said boxes is materially reduced. y

An additional advantage of the construction herein described over the old form depicted in Figure 7 isthatthus formed and braced by the material 22 as shown in Figure 5 the edge of the box can not shift.

Having thus described this invention, I hereby reserve the benefit of" all changes in form, arrangement, order, or use of parts, as it is evident thatmany minor changes may be made therein without departing from the spirit of this invention or the scope of v the following claims.

I claim:

1. In a device of the character described, a box corner formed along creased lines, a bracing portion formed on the inner side of said corner from the excess paste-board re- ,sulting from the forming of said corners.

2. A box joint including a laminated body creased to permit folding at right-angles to provide a reinforcing-portion along the line of the crease.

Tn'testimony whereof I hereunto aflix my signature.

. BERTHOLD A. LANGE. 

